US civic & property data: geocoding, census tracts, Opportunity Zones, FEMA flood zones.
Connect Runs on your machine
claude mcp add civic-library-mcp -e CENSUS_API_KEY=<CENSUS_API_KEY> -- npx -y [email protected]{
"mcpServers": {
"civic-library-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}{
"mcpServers": {
"civic-library-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}{
"servers": {
"civic-library-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"CENSUS_API_KEY": "<CENSUS_API_KEY>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
CENSUS_API_KEYOptional, secret | Free Census API key (https://api.census.gov/data/key_signup.html). Required only for the get_tract_demographics tool; all other tools work with no key. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 16 Jun 2026 |
| Last updated | 16 Jun 2026 |
| Registry name | io.github.adriancisnerosspeed-hub/civic-library-mcp |
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